Add package data for GPU rent and update CLI documentation

- Added package data configuration for the 'gpu_rent' package in pyproject.toml.
- Updated README.md to include usage instructions for Windows and Unix launchers.
- Enhanced CLI documentation in cli.md to reflect new commands and their functionalities.
- Revised setup.md to clarify installation steps and environment setup.
- Improved error handling and command descriptions in the CLI implementation.
- Added new functions for model version handling and flavor resolution in the codebase.
- Updated state management to include additional properties for better tracking.

gpu-rent.bat

@@ -0,0 +1,15 @@
+@echo off
+setlocal EnableExtensions
+cd /d "%~dp0"
+chcp 65001 >nul
+
+rem cmd.exe / Explorer: bypass ExecutionPolicy. Logic lives in gpu-rent.ps1.
+if "%~1"=="" (
+    powershell.exe -NoProfile -ExecutionPolicy Bypass -File "%~dp0gpu-rent.ps1"
+    echo.
+    pause
+    exit /b %ERRORLEVEL%
+)
+
+powershell.exe -NoProfile -ExecutionPolicy Bypass -File "%~dp0gpu-rent.ps1" %*
+exit /b %ERRORLEVEL%